Means and method for producing facsimile carbon impressions



. 1", 2 Sept. 20,1927. INZINGA 643,

MEANS AND METHOD FOR PRODUCING FACSIMILE CARBON IMPRESSIONS Filed Jan. 2, 1926 W niziinn zm e nulllll I mmllllll Patented Sept. 20, 1927.

, Wm STATES PATENT OFFICE.

rIIIL'Ir INZINGA, OF CHICAGO, ILLINOIS, AssIGNoa oI'rIrTY-oNErER cnNr To n. M. PITTENGER, OF HICAGO, ILLINOIS.

MEANS AND METHOD FOR PRODUCING FAOSIMILE' CARBON IMPRESSIONS.

Application filed January It is common practice to prepare large numbers of form letters or other text matter in close simulation of copies such as are produced according to the usual methods'of typewriting. For obtaining similar impressions having the appearance of carbon copies, no satisfactory means has as yet been devised, so far as my knowledge goes. A strong demand exists, however, for multiple carbon copies, or facsimiles thereof, so as to render highly desirable the production of such a commodity. By the present invention, I am enabled to produce facsimile car bon impressions which readily pass for true carbon copies, and accomplish this result both economically and dependably. v

In the accompanying drawing which sets forth an apparatus by which impressions of this character may be produced:

Figure 1 is a longitudinal section taken' on line 1-1 of Fig. 2;

Fig. 2 is a view in plan; and' Fig. 8 is an enlarged detail in section of a single type and associated elements in relation to the work.

At the outset I would have it understood that my invention may be practiced successfully with any of th usual types or kinds of printing apparatus, whether the same be a press, a stenciling machine, or what not. It is essential only that there be a printing plate or type form, an inking sheet or ribbon, and a means for pressing thereupon the work which is to take the impression. As an illustrative apparatus, I have suggested in the drawing a conventional letter reproducing machine having a chase frame 5 in which is secured a type form 6 with th aid, if need be, of wedge or spacer blocks 7 of any approved kind. 'As is usual in such cases, an inking ribbon 8 is interposed between the form and a paper sheet 9 which constitutes the work. The printing operation is performed by moving a platen 10 over the work, the platen being mounted to travel in guides 11 having associated spring means whereby, with each reciprocation, it is press d upon the work. Apparatus answering generally to this description has long been known, and no claim thereto as such is here advanced.

My invention is applicable to such a machine, or indeed to any printing apparatus, which combines in its structure a printing plate or a form, an inking ribbon and pres- 2, 192s. Serial No. 79,016.

sure means. It consists essentially in the interposition between the form and the inking ribbon of a relatively stiff sheet 12 which may be termed the blurring medium. Such a sheet may be formed of different materials, such as certain kinds of paper, fabric, skin, etc., provided that it be endowed with the general characteristics which adapt it for the purposes, of this invention. As an example of one material which is particularly suitable, ordinary tracing cloth may be specified.

Referring now to Fig. 3, it will be noted that the sharp printing edge of the type is presented to the sheet 12 through which must be carried the impression that is di rected toward the inking ribbon. This impression is accordingly delivered indirectly, rather than directly. Because of. this circumstance, some of the definiteness and exactness which the sharp and narrow edge of the type would otherwise transmit to the inking ribbon and thence to the work is absorbed into the. interposed sheet 12. The printing impression received upon the work is, inconsequence, slightly blurred, enough so, in fact, to have the effect of a copy produced with the aid of a carbon sheet.

To best meet the requirements of this invention, the blurring medium should be relatively stiff and firm, otherwise'it will not long withstand the wear and tear incident to pressure from the sharp printing edges of the type. At the same time it should be sufliciently light to transmit to the ribbon the impressions received from the form. Tracing cloth has already been suggested as entirely suitable for this purpose,but other materials'having like impressionable and blurring properties may also be used. In using the term form herein, I have in mind any set-up of type, embossed, cast, or engraved plate which is capable of delivering inked impressions to the work.

I claim:

1. In a means for producing facsimile carbon impressions upon a work sheet, the combination of a form, a stationary blurring medium of stiff material which is suificiently yieldable to permit the form to transmit impressions therethrough, and inking means associated with the blurring medium and receiving therefrom an impression of reduced definiteness for deliveryto the work, substantially as described.

a 2. A process for producing facsimile carform impressiomfthe inkingribbon in turn bon impressions which consists in pressing delivering to a work sheet only so much of a type form against a stationary blurring the impression definiteness as is transmitted sheet of relatively stifi? material having from the blurring sheet, substantially as de- 5 yielclability suflicient to transmit to an asscribed. i

sociatecl inking ribbon only a desired portion of the clefiniteness received from the PHILIP 

